Resonance Raman Spectroscopy of Armchair Single-Walled Carbon Nanotubes

ORAL

Abstract

We performed resonance Raman spectroscopy studies of metallic single-walled carbon nanotubes (SWNTs), including armchair SWNTs from (6,6) through (10,10). The measurements were carried out with excitation of 440-850 nm on aqueous ensemble samples of SWNTs enriched in metallic species. From this, we generated Raman excitation profiles (REPs) of the radial breathing mode and compare the REPs of armchairs and other metallic species. Additionally, we measured REPs of the G-band mode and observed how the Breit-Wigner-Fano line shape of the G$^{-}$ peak evolves in peak position, width and intensity relative to the G$^{+}$ peak as different metallic nanotubes are excited. By combining these studies with absorption and photoluminescence excitation spectroscopy studies, we present a comprehensive examination of the optical signatures of metallic SWNTs.

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Authors

  • Erik Haroz

    Rice University, Department of Electrical and Computer Engineering, Rice University

  • William Rice

    Department of Electrical and Computer Engineering, Rice University

  • Benjamin Lu

    Department of Electrical and Computer Engineering, Rice University

  • Robert Hauge

    Chemistry Dept., Rice University, Department of Chemistry, Rice University

  • Donny Magana

    Chemistry Division, Los Alamos National Laboratory

  • Stephen Doorn

    Chemistry Division, Los Alamos National Laboratory, Los Alamos National Laboratory

  • Pasha Nikolaev

    Johnson Space Center, National Aeronautics and Space Administration

  • Sivaram Arepalli

    Johnson Space Center, National Aeronautics and Space Administration

  • Junichiro Kono

    Rice Univeristy, ECE Dept., Rice University, Dept. of Electrical and Computer Engineering, Rice University, Rice University, Department of Electrical and Computer Engineering, Rice University